Thursday night, the baby's father, who was also wounded in the shooting, was released from the hospital.

Jonathan Watkins talked to detectives at the Chicago Police Department's Area South Headquarters after claims the 28-year-old, who is a known gang member with a lengthy criminal record, was not cooperating with police.

Family spokesperson Pastor Corey Brooks escorted Watkins.

"Jonathan was open and forthright about the information that they asked," said family spokesperson Pastor Corey Brooks, who escorted Jonathan Watkins. "He answered all their questions, he gave them all the information that they needed."

Friday afternoon, some still flocked the Woodlawn neighborhood where tragedy struck in support of the baby's family and to pray that the killing stops.

Kimberly Commons has lost two sons to gun violence, her youngest Devon on the same day Hadiya Pendleton was killed.

"I'm hoping I can meet the mother one day, I hope I can pray for her and get healed cause it's going to take a long, long time," Commons said.

By catching the killer, Chicago police are also hoping to avoid a cycle of gang retribution for the shooting.

"We had a very, very strong deployment," Chicago Police Supt. Garry McCarthy said. "And not just in the vicinity of the two gangs that we believed that are involved in this conflict, but in the vicinity of all the gangs in that area. This is going to be a hot topic."